<template>
  <div>
    <el-card style="margin: 10px 0">
      <div slot="header" class="clearfix">
        <!-- 头部左侧内容 -->
        <el-tabs class="tab" v-model="activeName">
          <el-tab-pane label="销售额" name="sale"></el-tab-pane>
          <el-tab-pane label="访问量" name="visite"></el-tab-pane>
        </el-tabs>
        <!-- 头部右侧内容 -->
        <div class="right">
          <span @click="setDay">今日</span>
          <span @click="setWeek">本周</span>
          <span @click="setMonth">本月</span>
          <span @click="setYear">本年</span>
          <el-date-picker v-model="date" class="date" type="daterange" range-separator="-" start-placeholder="开始日期" end-placeholder="结束日期" size="mini" value-format="yyyy-MM-dd">
          </el-date-picker>
        </div>
      </div>
      <!-- 内容区域 -->
      <div>
        <el-row :gutter="10">
          <el-col :span="18">
            <!-- 容器 -->
            <div class="charts" ref="charts"></div>
          </el-col>
          <el-col :span="6">
            <h3>门店{{ title }}排名</h3>
            <ul>
              <li>
                <span class="rindex">0</span>
                <span>肯德基</span>
                <span class="rvalue">51232</span>
              </li>
              <li>
                <span class="rindex">1</span>
                <span>麦当劳</span>
                <span class="rvalue">51232</span>
              </li>
              <li>
                <span class="rindex">2</span>
                <span>海底捞</span>
                <span class="rvalue">51232</span>
              </li>
              <li>
                <span class="rindex">3</span>
                <span>西贝筱面村</span>
                <span class="rvalue">51232</span>
              </li>
              <li>
                <span>4</span>
                <span>汉堡王</span>
                <span class="rvalue">51232</span>
              </li>
              <li>
                <span>5</span>
                <span>真功夫</span>
                <span class="rvalue">51232</span>
              </li>
              <li>
                <span>6</span>
                <span>德克士</span>
                <span class="rvalue">51232</span>
              </li>
              <li>
                <span>7</span>
                <span>必胜克</span>
                <span class="rvalue">51232</span>
              </li>
            </ul>
          </el-col>
        </el-row>
      </div>
    </el-card>
  </div>
</template>

<script>
// 引入 echarts
import * as echarts from 'echarts'
import moment from "moment"

export default {
  name: 'Sale',
  data () {
    return {
      activeName: 'sale',
      mycharts: undefined,
      // 收集日历的数据
      date: []
    }
  },
  mounted () {
    // 初始化 echarts 实例
    this.mycharts = echarts.init(this.$refs.charts)
    // 配置数据
    this.mycharts.setOption({
      title: {
        text: '销售额趋势'
      },
      tooltip: {
        trigger: 'axis',
        axisPointer: {
          type: 'shadow'
        }
      },
      grid: {
        left: '3%',
        right: '4%',
        bottom: '3%',
        containLabel: true
      },
      xAxis: [
        {
          type: 'category',
          data: ['一月', '二月', '三月', '四月', '五月', '六月', '七月', '八月', '九月', '十月', '十一月', '十二月'],
          axisTick: {
            alignWithLabel: true
          }
        }
      ],
      yAxis: [
        {
          type: 'value'
        }
      ],
      series: [
        {
          name: 'Direct',
          type: 'bar',
          barWidth: '60%',
          data: [10, 52, 200, 334, 390, 330, 220, 110, 98, 166, 123, 56],
          color: 'yellowgreen'
        }
      ]
    })
  },
  computed: {
    // 标题
    title () {
      return this.activeName === 'sale' ? '销售额' : '访问量'
    }
  },
  watch: {
    title () {
      // 重新修改图表配置数据
      // 图表的配置数据可以重新修改,如果有新的数值,则使用,如果没有还使用以前的
      this.mycharts.setOption({
        title: {
          text: this.title
        }
      })
    }
  },
  methods: {
    // 今天
    setDay () {
      const day = moment().format('YYYY-MM-DD')
      this.date = [day, day]
    },
    // 本周
    setWeek () {
      const start = moment().day(1).format('YYYY-MM-DD')
      const end = moment().day(7).format('YYYY-MM-DD')
      this.date = [start, end]
    },
    // 本月
    setMonth () {
      const start = moment().startOf('month').format('YYYY-MM-DD')
      const end = moment().endOf('month').format('YYYY-MM-DD')
      this.date = [start, end]
    },
    // 本年
    setYear () {
      const start = moment().startOf('year').format('YYYY-MM-DD')
      const end = moment().endOf('year').format('YYYY-MM-DD')
      this.date = [start, end]
    }
  }
}
</script>

<style scoped>
.clearfix {
  display: flex;
  justify-content: space-between;
  position: relative;
}
.tab {
  width: 100%;
}
.right {
  position: absolute;
  right: 0px;
}
.date {
  width: 250px;
  margin: 0 20px;
}
.right span {
  margin: 0 15px;
}
.charts {
  width: 100%;
  height: 300px;
}
ul {
  list-style: none;
  width: 100%;
  height: 300px;
  padding: 0px;
}
ul li {
  height: 8%;
  margin: 10px 0;
}
.rindex {
  float: left;
  width: 20px;
  height: 20px;
  line-height: 20px;
  border-radius: 50%;
  background: black;
  color: white;
  text-align: center;
}
.rvalue {
  float: right;
}
</style>